Female Grant's gazelles, Serengeti Plain

A Horny Proposition

Why do some female bovids have horns, whereas others don’t?

umbrellabird

Pompadours in the Palms

A rare bird’s elaborate mating habits help a tropical tree disperse its seeds.

chromosomes

Aging, Cancer and Stress

Elizabeth Blackburn's work on telomeres led to new research and discoveries

White Winged Vampire Bat

The Curious, Bloody Lives of Vampire Bats

Vampire bats display adaptations to their diet

eels

Slippery Business

Scientists race to understand the reproductive biology of freshwater eels.

To Kill a Cormorant

Are double-crested cormorants overrunning their niche—or recovering from centuries of suppression?

bonobos exhibit "play face"

Bodies in Sync

Contagious laughter, yawns, and moods offer insight into empathy’s origins.

snakes

A Long Drink of Water

For thirsty sea snakes, the ocean can be a desert.

tiger

Far from the Forests of the Night

Tigers and other “exotics” have become hefty commodities in the U.S.

Meet the Alloparents

Shared child care may be the secret of human evolutionary success.

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Recent Stories

Algae, plants and humans: three groups of organisms that used chemistry to change the planet.

Peaks protected fifty years ago by the Wilderness Act no longer keep mountain goats safe from human impact.

By the 1920s, California had lost all of its grizzly bears—once considered a distinct species and an emblem of the state.

Preconceptions skew our view of the biggest killer in the developed world, atherosclerosis.